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JEE Main Chemistry question

ChemistryStructure of AtomJEE Main

The de Broglie wavelength of an electron in 3rd orbit of He ion is equal to that of electron in orbit of Be ion. What is the value of ?

Answer: 6

Solution

De Broglie wavelength in a Bohr orbit, , with , gives $λ = 2π

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Question ID VK-133027